Improvement in metallic hoops



UNITED STATES PATENT QEEICE.

EDGAR O. HAMLIN, OF PAVILION, NEW YORK.

IMPROVEMENT IN METALLIC HOOPS.

Specification forming part of Letters Patent No. 119,844, dated October 10, 1871; antedated September 30, 1871.

To all whom it may concern:

Be it known that I, EDGAR O. HAMLIN, of Pavilion, in the county of Genesee and the State of New York, have invented certain Improvements .in Metallic Barrel-Hoops, of which the following is a specification:

My invention relates to a novel plan of securing the ends of met-allie hoops, by which their construction is much simplified and cheapened.

In the drawing, Figure l is a horizontal section of my invention. Fig. 2 is an elevation in the direction of the arrow, Fig. 1. Fig. 3 is an elevation of one extremity of the hoop.

The hoop A is notched near each extremity, half way across, as shown in Fig. 3, and the ends when joined lap under the body, similarly to those of an ordinary wooden hoop. common method of locking, however, the ends or laps are lia-ble to work out of place laterally, and, moreover, but one-half the strength of the material is obtained. I therefore form a lip, b, from the shoulder of one or both notches by making a short"longitudinal slit at the bottom ofthe notch, as shown in Fig. 3. The lips b are slightly bent inward and lap over upon the inner face of the hoop, and when the latter is locked draw past each other, as indicated in Fig. 2. Thus they prevent the hoop from parting laterally at the lock unless it is compressed so as to slide the lips out of contact, which cannot take place when the hoop is on the barrel. To further retain the extremities or laps in position, and also increase the strength of the lock, I make indentations, a, upon the inner face of the laps, projecting also into the body of the hoop, as

. shown. These depressions may be produced by a punch or set 7 of any suitable shape, but pref- With this.

erably hemisplierical, and should be deep enough to form a hold for the lap upon the body of the loop.

It is evident that the greater the strain upon the hoop in being driven on the barrel the closer these parts will be pressed together, and consequently the more surely the indentations will hold. The strength ofthe hoop, as before mentioned, is obviously reduced iifty percentum by the notches in the extremities, but by means of the indentation a each of the laps is made fast to the body of the hoop beyond th c notches, and therefore if the indentations are sufficient in size or number to hold one-half the strain upon the hoop, which is perfectly practicable, then the whole strength of the material is retained. It will be observed that the extremities of the hoop must cross and lie under the body in order to render the indentations a. of any effect as a lock. The notches in the laps are conveniently cut with a punch and die, and the indentations formed at the same time; but the latter are preferably added after the hoop is put together and locked, in order that the parts may register without fail. This plan is much cheaper and better than punch ing and riveting as' commonly practiced, since the end ofthe hoop can be prepared by suitable tools at a single operation, While the strength ot the metal is uninipaired.

lVhat I clailn as my invention is The metallic hoop-lock, provided with overlapping lips b and indentations a, arranged to act conjointly for the purposes set forth.

E. O. HAMLIN.

Witnesses:

F. H. CLEMENT,

A. H. SARGENT. (40) 

